The DB 420 works very well top mounted on our 60' Rhon 25 tower. It has
bent once at the base of the antenna, but that was in more than 60 mph wind
gusts. Middle Georgia has lots of gusting winds and tornado activity so that
probably won't be the last time.
John
KU4RW
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Chuck is correct. The 413 is 18 ft 4 inches long and is rated 12 dB gain
and rated to survive 1/2 inch ice at 90 mph.
The 411 is 9 ft 5 inches long , 9 dB gain 112 mph wind with 1/2 inch radial
ice.
The 408 is 6.6 dB gain and will survive with 1/2 ice at 85 mph.
The 420 is 9.2 dB gain 18 ft 1 inch long and rated to withstand 70 mph with
1/2 inch ice.
They are all good in my opinion. I have used them all including the DB-404
and they have survived the NE Ohio winters. even with the 420 top mounted
on towers but there is a lot of flex at winds above 60 mph. I never had an
antenna bend but did have on installation where the 420 was top mounted and
the pipe that it was clamped to bent during a storm with gusts in excess of
70 mph.
As far as which antenna to use - It depends on the installation, HAAT, top
mount, side mount, omni pattern, etc.
Rich WA8DBW
http://www.wa8dbw.ifip.com
----- Original Message -----
From: "Chuck Kelsey" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, March 28, 2005 6:26 PM
Subject: Re: [Repeater-Builder] A Good 440 Anttena
>
> I think my wife stole my Decibel catalog ;-)
>
> The 413 is 8 elements and the 411 is 4, right?
>
> If you're going to side mount on a tower, use either. If you're going to
> top
> mount, I prefer the shorter 411. The longer antennas have too much flex in
> the wind to top mount, in my opinion. Others will disagree, but that would
> be my choice.
>
> Chuck
> WB2EDV
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--- End Message ---
